6. What velocity vector will move you 200 miles east in 4 hours travelingat a constant speed?

Your answer is 120miles 

The answer is 4f======since electrostatic force is given by    we let f be the electrostatic force when  r = 1 m    if we let  denote the electrostatic force when the distance is decreased so that r = 0.5m, then    we established earlier that f = kq₁q₂. therefore    the force will now be 4f.

The answer is n = 2  and    n = 3